Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Motion in a Straight Line
0 votes

A juggler maintains four balls in motion making each of them raise to a height of 20m from his hand.What time interval should he maintain, for the proper distance between them $(g=10 m/s^2)$

\[(a)\;3s\quad (b)\;\frac{3}{2}s \quad (c)\;2s \quad (d)1 s\]

Can you answer this question?

1 Answer

0 votes
For each ball
$\quad -u^2=2(-10)20$
$\qquad u=20 m/s$
also $v=u+at$
$\qquad 0=20-10 t$
$\qquad t=2 sec$
The ball has to return to his hand
so total time is 4 seconds
so each ball must be thrown at interval of $\large\frac{4}{4}$$=1 sec$ to maintain proper distance
Hence d is the correct answer.


answered Jun 26, 2013 by meena.p
edited Jan 25, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App